David & Diane Chen on thu 22 apr 99
Just did a bunch of test tiles. Used 4 different mason stains and used the
Digitalfire 20=25 gloss glaze and matte glaze.
Other facts:
1. Added 5=25 mason stains to 100 gram tests
2. Fired a 20 hour process from Jan Walker to cone 6 ish. (Interesting =
since
this was my first ramp/hold program and I couldn't figure out how the kiln =
shut
off, I have been up for several days). Ahhh, my confidence is building. . .
3. After Barney's experience, I let the glazes sit a day before I applied=
it
to the tiles
4. I tried ultra thick and ultra thin variations
Interestingly enough, the gloss glaze tiles came out great. and the Matte
glazes crawled. I also tried a few variations on the floating blue that =
came
out floating green on blue=21 That was a surprise.
For reference: The DigitalFire Matte glaze which I used included:
Wollastonite 27
Frit 3124 36
EpkKaolin 35
Flint 5
Still trying to figure out the impact materials have in the glaze. Does =
anyone
have any ideas, should I have added Bentonite for the stains to work?
Diane
Georgetown, MA
Barney Adams on fri 23 apr 99
Hi,
One of the things that threw me off was my test tiles held my test
glazes fine it did'nt show up until I covered a larger area of a medium
size pot that I saw the crawling. Since the test was from a smaller
batch I really thought the setting for 24 hours was the problem.
Now I wonder if it is'nt my recipe. I'm thinking of trying a diffrent tack
for a test and see if it doesnt do better.
Barney
David & Diane Chen wrote:
> ----------------------------Original message----------------------------
> Just did a bunch of test tiles. Used 4 different mason stains and used the
> Digitalfire 20% gloss glaze and matte glaze.
>
> Other facts:
>
> 1. Added 5% mason stains to 100 gram tests
>
> 2. Fired a 20 hour process from Jan Walker to cone 6 ish. (Interesting sinc
> this was my first ramp/hold program and I couldn't figure out how the kiln shu
> off, I have been up for several days). Ahhh, my confidence is building. . .
>
> 3. After Barney's experience, I let the glazes sit a day before I applied i
> to the tiles
>
> 4. I tried ultra thick and ultra thin variations
>
> Interestingly enough, the gloss glaze tiles came out great. and the Matte
> glazes crawled. I also tried a few variations on the floating blue that came
> out floating green on blue! That was a surprise.
>
> For reference: The DigitalFire Matte glaze which I used included:
>
> Wollastonite 27
> Frit 3124 36
> EpkKaolin 35
> Flint 5
>
> Still trying to figure out the impact materials have in the glaze. Does anyon
> have any ideas, should I have added Bentonite for the stains to work?
>
> Diane
> Georgetown, MA
Mason Batchelder on sat 24 apr 99
Dear Barney,
I have been testing glazes all my life in pottery since 1963 and I can't tell
you how many times the small batches of 100 grams came out one way and the
expanded mixed glaze gave entirely different sooooooooooooo often.I always
told my students to enlarge the receipe in stages and be aware that the
claybody on some glazes makes a major difference.Taking a home food receipe
to a catering size and visa versa gives the same problem.
Just my 2 cents worth.
Margaret Arial in Lexington,S.C.(100 miles south of NCECA 2001 SITE)
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